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得到一個底面半徑6釐米,高8釐米的圓柱 底面積是 6×6×3.14=113.04平方釐米 側面積是 6×2×3.14×8=301.44平方釐米 表面積是 113.04×2+301.44=527.52平方釐米 體積是 113.04×8=904.32立方釐米
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